From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andriin@fb.com>,
dwarves@vger.kernel.org, Networking <netdev@vger.kernel.org>,
bpf <bpf@vger.kernel.org>, Yonghong Song <yhs@fb.com>,
Hao Luo <haoluo@google.com>, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Joe Lawrence <joe.lawrence@redhat.com>,
Mark Wielaard <mjw@redhat.com>
Subject: Re: [PATCH 2/3] bpf_encoder: Translate SHN_XINDEX in symbol's st_shndx values
Date: Sat, 23 Jan 2021 22:08:10 -0800 [thread overview]
Message-ID: <CAEf4BzaaP8YwCsQpiSkCCgYFTqFJ-yV234u0dtuxOgEQgwPeiA@mail.gmail.com> (raw)
In-Reply-To: <20210123212341.GC117714@krava>
On Sat, Jan 23, 2021 at 1:23 PM Jiri Olsa <jolsa@redhat.com> wrote:
>
> On Thu, Jan 21, 2021 at 03:32:40PM -0800, Andrii Nakryiko wrote:
>
> SNIP
>
> > But the current variant looks broken. Oh, and
> > elf_symtab__for_each_symbol() is similarly broken, can you please fix
> > that as well?
>
> we'll have to change its callers a bit, because of hanging 'else'
> I'll send this separately if that's ok, when I figure out how to
> test ctf code
>
oh, else sucks. Sure, no problem doing it separately.
> jirka
>
>
> ---
> diff --git a/elf_symtab.h b/elf_symtab.h
> index 489e2b1a3505..6823a8c37ecf 100644
> --- a/elf_symtab.h
> +++ b/elf_symtab.h
> @@ -99,10 +99,9 @@ elf_sym__get(Elf_Data *syms, Elf_Data *syms_sec_idx_table,
> * @index: uint32_t index
> * @sym: GElf_Sym iterator
> */
> -#define elf_symtab__for_each_symbol(symtab, index, sym) \
> - for (index = 0, gelf_getsym(symtab->syms, index, &sym);\
> - index < symtab->nr_syms; \
> - index++, gelf_getsym(symtab->syms, index, &sym))
> +#define elf_symtab__for_each_symbol(symtab, index, sym) \
> + for (index = 0; index < symtab->nr_syms; index++) \
> + if (gelf_getsym(symtab->syms, index, &sym))
>
> /**
> * elf_symtab__for_each_symbol_index - iterate through all the symbols,
> diff --git a/libctf.h b/libctf.h
> index 749be8955c52..ee5412bec77e 100644
> --- a/libctf.h
> +++ b/libctf.h
> @@ -90,11 +90,9 @@ char *ctf__string(struct ctf *ctf, uint32_t ref);
> */
> #define ctf__for_each_symtab_function(ctf, index, sym) \
> elf_symtab__for_each_symbol(ctf->symtab, index, sym) \
> - if (ctf__ignore_symtab_function(&sym, \
> + if (!ctf__ignore_symtab_function(&sym, \
> elf_sym__name(&sym, \
> ctf->symtab))) \
> - continue; \
> - else
>
> /**
> * ctf__for_each_symtab_object - iterate thru all the symtab objects
> @@ -105,11 +103,9 @@ char *ctf__string(struct ctf *ctf, uint32_t ref);
> */
> #define ctf__for_each_symtab_object(ctf, index, sym) \
> elf_symtab__for_each_symbol(ctf->symtab, index, sym) \
> - if (ctf__ignore_symtab_object(&sym, \
> + if (!ctf__ignore_symtab_object(&sym, \
> elf_sym__name(&sym, \
> ctf->symtab))) \
> - continue; \
> - else
>
>
> #endif /* _LIBCTF_H */
>
next prev parent reply other threads:[~2021-01-24 6:09 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 20:22 [PATCHv2 0/3] dwarves,libbpf: Add support to use optional extended section index table Jiri Olsa
2021-01-21 20:22 ` [PATCH 1/3] elf_symtab: Add support for SHN_XINDEX index to elf_section_by_name Jiri Olsa
2021-01-21 23:10 ` Andrii Nakryiko
2021-01-21 23:34 ` Jiri Olsa
2021-01-21 20:22 ` [PATCH 2/3] bpf_encoder: Translate SHN_XINDEX in symbol's st_shndx values Jiri Olsa
2021-01-21 23:32 ` Andrii Nakryiko
2021-01-22 9:32 ` Jiri Olsa
2021-01-22 20:46 ` Jiri Olsa
2021-01-22 22:55 ` Andrii Nakryiko
2021-01-23 18:51 ` Jiri Olsa
2021-01-23 20:07 ` Andrii Nakryiko
2021-01-23 20:21 ` Mark Wielaard
2021-01-23 20:08 ` Mark Wielaard
2021-01-23 20:15 ` Jiri Olsa
2021-01-23 21:23 ` Jiri Olsa
2021-01-24 6:08 ` Andrii Nakryiko [this message]
2021-01-21 20:22 ` [PATCH bpf-next 3/3] libbpf: Use string table index from index table if needed Jiri Olsa
2021-01-21 23:46 ` Andrii Nakryiko
-- strict thread matches above, loose matches on Subject: below --
2021-01-19 22:12 [PATCH 0/3] dwarves,libbpf: Add support to use optional extended section index table Jiri Olsa
2021-01-19 22:12 ` [PATCH 2/3] bpf_encoder: Translate SHN_XINDEX in symbol's st_shndx values Jiri Olsa
2021-01-20 2:03 ` Andrii Nakryiko
2021-01-20 12:25 ` Jiri Olsa
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